I Lost Another

I lost another,  
Who swore they'd stay.  
"Friends to the end,"
That's what they say.
But I can hear their whispers fade,
And their footsteps recede.  
I can't ignore the difference they made,
But when I'm gone they take no heed.
Is that love? Is that a friend?
Go then, and leave me these scars to tend!
Who are you, so flawed and amoral,
To abandon me when we quarrel?
Who are you, so perfect and kind,
To leave me to the vices of my own mind?
Who are you, to call me close,
With the audacity to open my book,
Who are you, to know me better than most,
And leave after you've gotten a good look?